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采用数值模拟的方法研究了电渣炉重熔期大电流导体产生磁场的空间分布规律。利用ANSYS软件包,通过求解磁矢量微分方程,确定了磁感应强度在空间的分布,计算结果与实际测量数据进行了对比。在自耗电极轴向方向上各点的磁感应强度在两端处大并且变化较大,中间磁感应强度最小;磁感应强度的总体趋势是随距离的增加而减弱,但在涡流区域将发生畸变,铁磁体表面的场强随深度增加而降低;在主回路中,各区域磁感应强度由强到弱的顺序为导线区域、电极区域、立柱和横臂区域、结晶器区域。
The spatial distribution of magnetic field generated by high current conductor during remelting of ESR furnace was studied by numerical simulation. By using ANSYS software package, the distribution of magnetic flux density in space was determined by solving the magnetic vector differential equation. The calculated results were compared with the actual measured data. In the axial direction of the consumable electrode, the magnetic induction intensity of each point is large and varies greatly at both ends, and the middle magnetic induction intensity is the smallest. The overall trend of magnetic induction intensity is weakened with the increase of distance, but distortion occurs in the eddy current region, The field strength of the ferromagnetic surface decreases with the increase of depth. In the main circuit, the order of the magnetic induction intensity of each area from strong to weak is the conductor area, electrode area, column and cross arm area, and mold area.